522539 has 4 divisors (see below), whose sum is σ = 528024. Its totient is φ = 517056.

The previous prime is 522523. The next prime is 522541. The reversal of 522539 is 935225.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 522539 - 2⁴ = 522523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (522569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2597 + ... + 2790.

It is an arithmetic number, because the mean of its divisors is an integer number (132006).

2⁵²²⁵³⁹ is an apocalyptic number.

522539 is a deficient number, since it is larger than the sum of its proper divisors (5485).

522539 is an equidigital number, since it uses as much as digits as its factorization.

522539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5484.

The product of its digits is 2700, while the sum is 26.

The square root of 522539 is about 722.8685911008. The cubic root of 522539 is about 80.5451825107.

Subtracting 522539 from its reverse (935225), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 522539 in words is "five hundred twenty-two thousand, five hundred thirty-nine".